internal/rosa: create metadata alongside artifact

This enables deferring evaluation of azalea-based packages and fixes the longstanding quirk of version being disjoint from other metadata.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/dbus.go

@@ -29,9 +29,7 @@ func (t Toolchain) newDBus() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newDBus,
-
+	native.mustRegister(Toolchain.newDBus, &Metadata{
 		Name:        "dbus",
 		Description: "a message bus system",
 		Website:     "https://www.freedesktop.org/wiki/Software/dbus/",
@@ -65,9 +63,7 @@ func (t Toolchain) newXDGDBusProxy() (pkg.Artifact, string) {
 	), version
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newXDGDBusProxy,
-
+	native.mustRegister(Toolchain.newXDGDBusProxy, &Metadata{
 		Name:        "xdg-dbus-proxy",
 		Description: "a filtering proxy for D-Bus connections",
 		Website:     "https://github.com/flatpak/xdg-dbus-proxy",